National Route 37 (国道37号, Kokudō Sanjūnana-gō) is a Japanese national highway connecting Oshamambe and Muroran in southwestern Hokkaido. The 81.1-kilometer-long (50.4 mi) highway begins at an intersection with national routes 5 and 230 in the town of Oshamambe. It travels along the northern side of Uchiura Bay, paralleling the Dō-Ō Expressway. At the eastern edge of the bay it enters the city of Muroran where it ends at an intersection with National Route 36.

Quick Facts National Route 37, Route information ...

National Route 37
国道37号
Japan National Route 37 highlighted in red
Route information
Length	81.1 km[1] (50.4 mi)
Existed	4 December 1952–present
Major junctions
West end	National Route 5 / National Route 230 in Oshamambe
Major intersections	Dō-Ō Expressway National Route 230 National Route 453
East end	National Route 36 in Muroran
Location
Country	Japan
Highway system
National highways of Japan Expressways of Japan
← National Route 36 → National Route 38

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National Route 37 is an 81.1-kilometer-long (50.4 mi) highway in southwestern Hokkaido that runs east from Oshamambe to Muroran. Its eastern terminus lies at an intersection in central Oshamambe where it meets national routes 5 and 230. From there national routes 37 and 230 travel together paralleling the coastline of Uchiura Bay and the Dō-Ō Expressway. Along the way from Oshamambe to Muroran, it passes through the towns of Toyoura and Tōyako and the city of Date. National Route 230 leaves National Route 37 in Toyoura traveling north to Lake Tōya and Sapporo.^[2] Shortly after crossing in to Muroran, the route splits from the Hakuchō Shindō, a bypass of National Route 37 that crosses the Hakuchō Bridge to the tip of Cape Chikiu and central Muroran, while the main route continues to eastern Muroran.^[3] National Route 37's eastern terminus in eastern Muroran is at an intersection where it meets National Route 36.^[2]

On 4 December 1952 the route was designated as Primary National Highway 37 between Oshamambe and Muroran.^[4] On 1 April 1965 the highway's designation was revised along with the other primary routes as General National Highway 37.^[5] When Mount Usu erupted on 31 March 2000, the town of Abuta was left with only National Route 37 as an evacuation route when the Dō-Ō Expressway closed.^[6]

The route lies entirely within Hokkaido.

More information Location, km ...

Location	km[7]	mi	Destinations	Notes
Oshamambe	0.0	0.0	National Route 5 / National Route 230 west – to Dō-Ō Expressway, Hakodate, Yakumo, Otaru, Kutchan	Western terminus; western end of National Route 230 concurrency
Kuromatsunai	14.2	8.8	Hokkaido Route 266 west – to Kuromatsunai Shindō, central Kuromatsunai
Toyoura	23.5	14.6	Hokkaido Route 344 west Hokkaido Route 609 south – Rebun Station
	29.4	18.3	Hokkaido Route 32 north Hokkaido Route 608 west – Ōkishi Station
	29.8	18.5	Dō-Ō Expressway – Hakodate, Sapporo	E5 exit 13 (Toyoura Interchange)
	36.1	22.4	Hokkaido Route 702 – Niseko, Rankoshi	One-quadrant interchange
	38.2	23.7	Hokkaido Route 97 north – Makkari
Tōyako	41.6	25.8	National Route 230 east – to Dō-Ō Expressway, Sapporo, Tōyako Spa	Eastern end of National Route 230 concurrency
	43.4	27.0	Hokkaido Route 578 north – Tōyako Onsen, Nishiyama Crater
Date	47.8	29.7	Hokkaido Route 386 east – Usu Station
	52.9	32.9	National Route 453 north – Kitayuzawa, Sōbetsu Hokkaido Route 779 south – Nagawa Industrial Park
	53.0	32.9	Hokkaido Route 385 west
	56.1	34.9	Hokkaido Route 519 north – Sōbetsu Hokkaido Route 982 south – Datemombetsu Station
	57.1	35.5	Hokkaido Route 145 north – to Dō-Ō Expressway
	59.4	36.9	Hokkaido Route 981
	62.3	38.7	Hokkaido Route 1057 west – Mareppu Station
	65.8	40.9	Hokkaido Route 779 north
Muroran	67.9	42.2	Hokkaido Route 107 (Muroran Belt Route) east – to Dō-Ō Expressway
	69.3	43.1	Hokkaido Route 704 west
	72.6	45.1	National Route 37 east (Hakuchō Shindō) – to Dō-Ō Expressway, Muroran Station, Hakuchō Bridge
	73.9	45.9	Hokkaido Route 127 north – to Dō-Ō Expressway
	79.0	49.1	Hokkaido Route 919 east
	80.7	50.1	Hokkaido Route 107 (Muroran Belt Route) east – Higashi-Muroran Station Hokkaido Route 919 west – Wanishi
	81.1	50.4	National Route 36 – to Dō-Ō Expressway, Tomakomai, Noboribetsu, Muroran Station, Cape Chikiu	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus

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